“Risk to do” 和 “doing” 是英语中常见的表达，但它们在用法和含义上有明显不同。
| 项目 | risk to do | doing |
| 含义 | 表示做某事的风险 | 表示正在做某事或习惯性动作 |
| 结构 | risk + to do | doing（动名词） |
| 例句 | He took a risk to start his own business. | She is doing her homework now. |
| 用法 | 强调风险行为 | 强调动作本身 |
总结：“risk to do” 强调为了某事而承担风险，而 “doing” 则表示正在进行的动作或习惯。
